Re: [PATCH v2] KVM: Move VM's worker kthreads back to the original cgroups before exiting.

Tejun Heo
2022-01-18T20:39:18Z

Hello,

On Tue, Jan 18, 2022 at 12:25:48PM -0800, Vipin Sharma wrote:
> Automated tools/scripts which delete VM cgroups after the main KVM
> process ends were seeing deletion errors because kernel worker threads
> were still running inside those cgroups. This is not a very frequent
> issue but we noticed it happens every now and then.

So, these are normally driven by the !populated events. That's how everyone
else is doing it. If you want to tie the kvm workers lifetimes to kvm
process, wouldn't it be cleaner to do so from kvm side? ie. let kvm process
exit wait for the workers to be cleaned up.

Thanks.

--
tejun